Does you Dayz say your hex Key isnt registered? I found the Solution!!!

1.Go to start

2.type regedit in search bar or in run

3.hit enter

4.go to HKEY_LOCAL_MACHINE

5.SOFTWARE

6.Wow6432Node

7.Bohemia Interactive Studio

8.ArmA 2 OA

9.right click the ArmA 2 OA folder

10. go to permissions

11.go to advanced

12.you should be in the permissions tab

13.under type you should see 5 or 4 allows and 1 deny

14 highlight the one that says deny and click remove

14 hit apply ok then ok again

15 on the right double click the name KEY

16 delete all the 00000000000 hit ok or it could be a fake banned key

17 go back to darky and change your key make sure you run darky as admin
or the key will not change

if all else fails and you did change the permissions run aram2oa threw steam it will for sure fix

Dont forget to Vouch I hope this helps anyone that needs help!